package com.platform.helper.bean;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * describe:spring bean工具类
 *
 * @author Administrator
 * @date 2020/04/30
 * @Time 0:37
 */
@Component
public class SpringContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if(SpringContextUtil.applicationContext == null) {
            SpringContextUtil.applicationContext = applicationContext;
        }
    }

    /**
     * 获取applicationContext
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过name获取 Bean
     * @param name beanName
     * @return beanClass
     */
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }

    /**
     * 通过name获取 Bean
     * @param clazz beanClass
     * @param <T> Bean
     * @return Bean
     */
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     * @param name beanName
     * @param clazz beanClass
     * @param <T> Bean
     * @return Bean
     */
    public static <T> T getBean(String name,Class<T> clazz){
        return getApplicationContext().getBean(name, clazz);
    }



}
